#include<stdio.h>
static int UncleWangExchg(int *cup1, int *cup2);
int main(void)
{
    int drank_of_ming = 1;
    int drank_of_li = 2;
    UncleWangExchg(&drank_of_ming, &drank_of_li);
    printf("Drank of Ming is %d\n", drank_of_ming);
    printf("Drank of Li is %d\n", drank_of_li);
    return 0;
}
int UncleWangExchg(int *cup1, int *cup2)
{
    int temp;
    temp = *cup1;
    *cup1 = *cup2;
    *cup2 = temp;
    return 0;
}